html,body{margin: 0; padding: 0; height: 100%;}
#head{
    background-color: rgb(72, 153, 185); color: white; text-align: center; font-size: 32px;
}
#zr,#zb{padding: 2%;}
#zr h1 a{font-size: 20px;}
#zb h1 a{font-size: 20px;}
thead{font-weight: bold; font-size: 20px;}
#zr tbody td{padding-left: 20px; text-align: center;}
#zr table img{width: 20px;}
#zb{display: none;}